Yeah, I do unfortunately have to echo the sentiments of the previous two comments when it comes to the RNG: from level 2 onwards, it is not uncommon to start a level and be promptly greeted with waves that you literally do not have the resources to contend with. I would recommend a bit of an easing when it comes to initial monster spawning (including the occasions where you see them spawned on top of each other) and perhaps an adjustment of the game's economy so people can more easily access the means to make tactical plays.
With all that said, I love the concept and aesthetics and I do genuinely want to see an update happen so I have an excuse to revisit the game. And kudos for building this over the course of a semester: whatever my gripes, I do have to afford some respect for that. 👍